Finding the Fourth Proportional to 99,364.86, 137,008.80 and 79,206.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,364.86 : 137,008.80 = 79,206.12 : x
2. Step 2: Convert to fraction form
   99,364.86/137,008.80 = 79,206.12/x
3. Step 3: Cross multiply
   99,364.86x = 137,008.80 × 79,206.12
4. Step 4: Simplify right side
   99,364.86x = 10,851,935,453.86
5. Step 5: Solve for x
   x = 10,851,935,453.86/99,364.86
6. Step 6: Final answer
   x = 109,213.01